Figure 5. Example excitation–emission matrix showing the general locations of selected fluorescence peaks. (The contour plot is made up of 2,291 unique excitation-emission (ex/em) pairs. Individual letters indicate the location of common peaks associated with different pools of dissolved organic matter, which are described in figure 21. FDOM indicates the region measured with standard in-situ sensors. Example shown is from a source‑water sample collected from the Clackamas River Water DWTP on April 4, 2010.)


First posted February 11, 2013